[sdiy] ca3080-based tri-to-sine

[Grant Richter]

Just as a note,

if you don't use the input diodes, you can use 1/2 a 13700 just like  
a 3080.

With the darlington buffer, it's is like a CA3094 (effects pedals).

But use an op-amp buffer for any "serious" design.

>
> But, with 3080s out of production, I suppose we should be
> using LM13700s or NE5517s. (they work fine for this).
>